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F-14

F-14

 

TROUBLESHOOTING & REPAIR

 

 

TROUBLESHOOTING GUIDE

Observe Safety Guidelines

 

 

detailed in the beginning of this manual.

 

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

TIG MODE PROBLEMS

 

 

 

Black areas along weld bead.

1.

The tungsten electrode may be

1. This may be a welding proce-

 

 

 

 

contaminated. Replace or

dure problem.

 

 

 

 

sharpen.

Contact The Lincoln Electric

 

 

 

 

 

 

 

 

2.

Shielding gas flow may be

Service Department, (216) 383-

 

 

 

 

insufficient.

2531 or 1-800-833-9353 (WELD).

 

 

 

3.

Contaminated gas or faulty gas

 

 

 

 

 

line or torch.

 

 

 

 

 

 

 

 

 

Black areas along weld bead at or

1.

Increase the gas post flow

1. This may be a welding proce-

 

 

near end of weld.

 

time.

dure problem.

 

 

 

 

 

Contact The Lincoln Electric

 

 

 

 

 

Service Department, (216) 383-

 

 

 

 

 

2531 or 1-800-833-9353 (WELD).

 

 

 

 

 

 

 

 

The machine has low output when

1.

The machine must be in Local

1. Contact The Lincoln Electric

 

 

in TIG 4-Step mode.

 

control mode when 4-Step is

Service Department, (216) 383-

 

 

 

 

used.

2531 or 1-800-833-9353

 

 

 

2.

The machine output control

(WELD).

 

 

 

 

 

 

 

 

may be set iincorrectly.

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

SQUARE WAVE TIG 355

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Lincoln Electric SVM118-A service manual Weld